Red-billed Chough

Pyrrhocorax pyrrhocorax

The red-billed chough, Cornish chough or simply chough is a bird in the crow family, one of only two species in the genus Pyrrhocorax. Its eight subspecies breed on mountains and coastal cliffs from the western coasts of Ireland and Britain east through southern Europe, North Africa and Middle East to Central Asia, India and China. Source

Where it is now

In the last 8 weeks this bird was recorded 21,915 times across 24 areas (each area is a 5 degree square).

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Movement and weather

Each season it is first heard regularly where daytime highs are around 17°C (typically 15 to 21°C, from 7 areas). That holds across 25° of latitude, which suggests its timing follows temperature more than the calendar.

Over the weeks it was present in the past year, its centre in Europe ranged from 39°N in December to 52°N in July, about 1,500 km apart.

Arrival dates

The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.

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Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.